PLZ I NEED HELP LESS THAN 5 MIN PLEASEPLEASE

in 4th grade, flavor fast won one-third the number of races that slow stue won. in 5th grade, flavor fast won 12 races and slow stue didnt race at all. if flavor fast wins 24 races in 6th grade, he will have the same total number of wins that slow stue had in 4th grade. how many races did slow stue win in the 4th grade